Clare Elwell led a study of the testing method in rural Gambia. The babies involved were between four and eight months old. They were examined three times over 15 months. Researchers noted the babies reactions to different images and sounds.
So if we present the babies with visual or auditory stimuli, then we expect certain brain areas to light up, essentially. We expect the oxygen to be diverted to certain brain regions.
She says that shows if those brain areas are fully developed or mature. And, she says, it shows if they are performing normally.
The babies looked at pictures of objects and people. They included full-color, life-size images of adults who moved their eyes and a video of an adult playing a game of now-I-see-you, now I dont. Also included were images of toys and a horse.
Human speech and non-human sounds such as running water and bells tested the babies hearing. And their brain recognition was compared to those of British children.
Clare Elwell says poor nutrition and childhood diseases threaten the African children. She says the goal is to identify babies needing to be better fed or treated for health problems that can harm brain development.
词汇讲解:
1. available adj.可用的; 有空的
例句:There are many validated assessments available.
有多种有效的评估手段。
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